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Experimental Study of Heat Supply System for Methanol Steam Reformers
|關鍵字:||catalyzed combustion reactor;觸媒燃燒;reformer heat supplier;catalyst support;theoretical air;Kaolinite;重組器供熱系統;觸媒載體;理論空氣量;高嶺土||出版社:||機械工程學系所||引用:|| 林昇佃、徐子隆等 編輯“燃料電池:新世紀能源”，滄海出版社出版，2004。  林仁信，“自發熱甲醇重組器製氫性能量測”，國立中興大學機械研究所碩士論文，民國94年。  高詠翔，“利用微流道反應器進行甲醇蒸氣重組產氫之實驗探討”，國立中興大學機械研究所碩士論文，2008。  N. E. Fernandes, Y. K. Park, D. G. Vlachos, “The autothermal behavior of platinum catalyzed hydrogen oxidation: experiments and modeling,”Combustion and Flame 118 (1999) 164-178.  Y. C. Chao, G. B. Chen, “Ignition hysteresis of hydrogen-air mixture in a platinum monolith honeycomb reactor,” The Third Asia-Pacific Conference on Combustion, June 24-27, Seoul, Korea (2001) 207-210.  W. J. Kuper, M. Blaauw, F. Van der Berg, G. H. Graaf,“Catalytic combustion concept for gas turbines,” Catalysis Today 47 (1999) 377-389.  X. Mu, L. Pan, N. Liu, C. Zhang, S. Li, G. Sun, S. Wang,“Autothermal reforming of methanol in a mini-reactor for a miniature fuel cell,”J. Hydrogen Energy 32 (2007) 3327-3334.  G. G. Park, S. D. Yim, Y. G. Yoon, C. S. Kim, D. J. Seo, K. Eguchi,“Hydrogen production with integrated microchannel fuel processor using methanol for portable fuel cell systems,”Catalysis Today 110 (2005) 108-113.  K. Tomishige, S. Kanazawa, S. I. Ito, K. Kunimori,“Catalyst development for direct heat supply from combustion to reforming with CO2 and O2,”Applied Catalysis A:General 244 (2003) 71-82.  D. G. Norton, E. D. Wetzel, and D. G. Vlachos,“Thermal Management in catalytic microreactors,”Ind. Eng. Chem. 45 (2006) 76-84.  李秉傑、邱宏明和王奕凱，“非均勻系催化原理與應用”渤海堂文化，1988。  蘇癸陽，“實用電鍍與實際”，台南復文書局。  G. G. Park, S. D. Yim, Y. G. Yoon, W. Y. Lee, C.S. Kim, D. J. Seo, K. Eguchi,“Hydrogen production with integrated microchannel fuel prosessor for portable fuel cell systems,”J. Power Sources 145 (2005) 702-706.  A. Karim, J. Bravo, D. Gorm, T. Conant, A Datye,“Comparison of wall-coated and pack-bed reactors for steam reforming of methanol,”Catalyst Today 110 (2005) 86-91.  W. Wiese, B. Emont, R. peters, “Methanol steam reforming in a fuel cell system,”J. of Power Sources 84 (1999) 187-193.  L. Alejo, R. Lago, M. A. Pena, J. L. G. Fierro,“Partial oxidation of methanol to produce hydrogen over Cu-Zn-based catalysts,”Applied catalyst A: General 162 (1997) 281-297.  L. Pan, S. Wang,“Methanol steam reforming in a compact plate-fin reformer for fuel cell systems,”Int. J. Hydrogen Energy 30 (2005) 973-979.  劉毅弘、顏貽乙等，“燃料電池微小型重組器及一氧化碳轉化技術”。  T. Kim, S. Kwon,“Design, fabrication and testing of a catalytic microreactor for hydrogen production,”J. Micromech. Microeng. 16 (2006) 1760-1768.  P. Reuse, A. Renken, K. Haas-Santo, O. Gorke, K. Schubert,“Hydorgen production for fuel cell application in an autothermal micro-channel reactor,”Chemical Engineering J. 101 (2004) 133-141.  G. Guan, K. Kusakabe, M. Taneda, M. Uehara, H. Maeda,“Catalytic combustion of methanol over Pd-based catalyst supported on a macroporous alumina layer in a microchannel reactor,”Chemical Engineering J. 144 (2008) 270-276.  G. G. Park, D. J. Seo, S. H. Park, Y. G. Yoon, C. S. Kim, W. L. Yoon,“Development of microchannel methanol steam reformer,”Chemical Engineering J. 101 (2004) 87-92.  J. A. Federici, D. G. Norton, T. Bruggemann, K. W. Voit, E. D. Wetzel, D. G. Vlachos,“Catalytic microcombustions with integrated thermoelectric elements for portable power production,”J. Power Sources 161 (2006) 1469-1478.  K. Takeda, A. Baba, Y. Hishinuma, T.Chikahisa,“Performance of a methanol reforming system for a fuel cell powered vehicle and system evaluation of a PEFC,”JSAE Review 231 (2002) 83-188.  Y. M. Lin, M. H. Rei,“Study on the hydrogen production from methanol steam reforming in supported palladium membrane reactor,”Catalysis Today 67 (2001) 77-84.  S. T. Yong, K. Hidajat and S. Kawi,“Reaction of auto thermal steam reforming of methanol to hydrogen using nano CuZnAl-catalyst,”J. Power sources 131 (2004) 91-5.||摘要:||
In this study, a catalyzed combustion reactor that is to serve as the heat supplier in a methanol-steam reformer unit is designed and its performance is experimentally tested. The designed reactor is fabricated by assembling two pieces of stainless steel plates with machined cavities serving as the combustion chamber. Platinum supported by the carbon fiber paper, stainless mesh or Kaolinite is used as the catalyst layer and is sandwiched between the two steel plates. The methanol and air are used as the fuel and oxidant, respectively. The performance of the reactor is tested under various fuel/air ratios, fuel/air flow rates, catalyst weights and thermal conditions.
For the adiabatic combustion case, it was found that the temperature of product increases with the increase of catalyst weight. Based on the magnitude of the product temperature, it was found that best reactor performance can be resulted when Kaolinite was used as the catalyst support. It was also found that better reactor can be achieved as the air flow rate is approximately equal to the theoretical air.
For the un-insulated combustion case, the measured reactor wall temperature is increased as the reactor wall thickness is reduced. However, the temperature reached is not high enough to maintain the required reforming temperature which is around 260℃. Further improved design with increased catalyst weight, high reactant residence time is still needed.
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